Skip to main content
OCLC Support

How does ILLiad know which field to use in an OpenURLMapping table when there can be redundancies in the different fields coming across

  • URLs from WorldCat contain redundant information
Applies to
  • Illiad

Different systems take different types of information for OpenURL, that is why there are different options that seem redundant.  For example, in this URL, it shows:


All of those referring to the OCLC Number which is the ILLiadFieldName ESPNumber.  What is important is that the Order it is put it in the OpenURLMapping table.  Whatever shows up first in the OpenURLMapping table, will be the one ILLiad will receive.

The Default OpenURLFieldValues for ESPNumber are:


So, ILLiad will take rft.dat and disregard the rest.

Additional information


Page ID